The Amplified Panatropic Computer Net (or Amplified Panatropic Computations) was a section within the domain of the Matrix on Gallifrey, (TV: The Invasion of Time) that cross-checked data stored within. (AUDIO: The Inquiry)

The APC, like the rest of the Matrix, was composed of trillions of electrochemical cells in a continuous matrix. When a Time Lord died, a brain scan was made at the moment of death and the impulses were transferred to the Matrix. The Net's function was to monitor life in the Capitol and use the combined knowledge and experiences to predict future developments. (TV: The Deadly Assassin) Every Time Lord, living and dead, from Rassilon to the lowest orderlies, had the brain scan entered into the Net, and it was illegal to remove their scan from it. The Garvond fed on these minds. (PROSE: The Dimension Riders)